JP2009150019A - Needle punching machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a needle punching machine which enhances entangling efficiency and improve workability on the replace of a punching needle, when fiber aggregate are entangled and secured to each other. <P>SOLUTION: A crank 24 is attached to a driving shaft 23 rotated by a motor, and a needle bar 22 is inserted into an attaching cylinder 26 through a crank rod 25. A part of the needle bar 22 which is inserted into the attaching cylinder 26 is held by thrust collars 22a from both sides. The needle bar 22 is lifted or lowered in association with the rotation of a driving shaft 23. Since the attaching cylinder 26 is loosely fitted onto the needle bar 22, the needle bar 22 is allowed to be rotated on the axis. When punching needles 22c are inserted into and withdrawn from the fiber aggregate, the needle bar 22 is rotated to irregularly shift the insertion and withdrawal spots. Therefore, the insertion and the withdrawal are evenly performed to enhance efficiency for entangling the fiber aggregate. Since the needle bar 22 is manually rotated and the punching needle 22c to be replaced is moved to a working position of a worker, the replacing work is facilitated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a needle punching machine in which fiber aggregates such as fabrics and felt materials are overlapped and punch needles are inserted and withdrawn so that the fiber aggregates are intertwined and fixed.

  A fiber accumulator such as a fabric or felt material in which a needle clamp is attached to the lower end of a needle bar that is moved up and down by the drive of a motor, and a plurality of punch needles fixed to the lower surface of the needle clamp are superimposed on the needle plate There is known a needle punching machine in which fiber aggregates can be entangled and fixed by hooking fibers onto barbs formed on each punch needle (see Patent Document 1).

In such a needle punch machine, the drive shaft is driven to rotate by a motor, and the needle bar is moved up and down via a crank rod attached to the drive shaft, one end connected to the crank and the other end connected to the needle bar. Has been converted to dynamic.
Here, conventionally, the crank rod and the needle bar are connected in such a manner that the needle bar cannot rotate around its axis.

If the needle bar is not rotatable about its axis in this way, when the punch needles are inserted into and extracted from the stacked fiber aggregates, the insertion / extraction points are concentrated at specific locations, and the fiber aggregates are entangled with each other. The efficiency of meeting was bad.
Further, if the needle bar is not rotatable, every time the punch needle of the needle punch machine is replaced, the operator has to go around in front of the punch needle to be replaced, and the replacement workability is poor.
JP 2007-131975 A

The problem to be solved by the present invention is to increase the efficiency of entanglement when the fiber aggregates are entangled and fixed by a needle punch machine.
Moreover, it is improving workability | operativity at the time of replacing | exchanging the punch needle | hook of a needle punch machine.

  In order to solve the above-described problems, a needle punching machine according to the present invention includes a needle bar, an elevating drive mechanism that supports the needle bar so as to be rotatable about its axis and movable up and down, and a lower end of the needle bar. An attached needle clamp, a punch needle fixed to the lower surface of the needle clamp and formed with a barb for hooking fibers, and a needle plate disposed below the needle bar, the insertion and removal of the punch needle And a needle plate for placing two or more fiber aggregates stacked so that the fibers are intertwined with each other.

Since the needle bar is rotatable about the axis, when the punch needle is inserted into and removed from the overlapped fiber assembly, the needle bar rotates and the insertion / extraction position is shifted irregularly.
Therefore, the punch needle is uniformly inserted into and removed from the fiber assembly, and the efficiency of entanglement of the fiber assembly is improved.
Further, by manually rotating the needle bar, the punch needle to be exchanged can be brought to the operator's work position side, so that the exchange work is facilitated.

  As a configuration for enabling the needle bar to rotate, the needle bar has a pair of collar portions arranged in parallel in the axial direction on a peripheral surface thereof, and the elevating drive mechanism is disposed between the collar portions of the pair of needle bars. It is preferable to have a mounting cylinder that loosely fits and supports the needle bar so that it can be moved up and down because the structure is simple.

  If the needle bar is further provided with a rotational drive mechanism for forcibly rotating the needle bar around its axis, the punch needles can be inserted into and removed from the fiber aggregate more uniformly than when the needle bar freely rotates, and the fibers Improves the efficiency of intertwining.

Since a configuration in which the needle bar that moves up and down can be rotated around the axis, the punch needle insertion / extraction points are not concentrated on the stacked fiber aggregates, and the entanglement of the fibers is improved.
Further, since the punch needle to be exchanged is brought to the operator side by manually rotating the needle bar, the exchange of the punch needle is facilitated.

As shown in FIGS. 1 to 3, the needle punching machine 1 has a bed 10 and an arm 20, and a guide 21 extending in the vertical direction is fixed in a head portion of the arm 20 via a bracket (not shown). Yes.
The guide 21 is provided with a pair of upper and lower cylindrical support pieces 21a and 21b at an interval.
The needle bar 22 elongated in the vertical direction is supported by the guide 21 by being inserted into the lower support piece 21a, and a pair of thrust collars 22a are spaced apart from each other in the middle of the needle bar 22 in the vertical direction. It is screwed.

On the other hand, a drive shaft 23 driven by a motor (not shown) is provided in the arm 20 so as to be substantially parallel to the upper surface of the bed 10.
A crank 24 is attached to the tip of the drive shaft 23, and one end of a connecting rod 25 is rotatably connected to a crank pin 24a of the crank 24.
The other end of the connecting rod 25 is rotatably connected to a pin-shaped rear end portion 26 a of a mounting cylinder 26, and a portion between the pair of thrust collars 22 a of the needle bar 22 is inserted into the mounting cylinder 26. is doing.
That is, the mounting cylinder 26 is sandwiched between the thrust collars 22 a so that it cannot slide up and down the needle bar 22.

Therefore, when the drive shaft 23 rotates, the rotational movement is converted into the up-and-down movement of the needle bar 22 via the crank 24, the connecting rod 25, and the mounting cylinder 26.
Here, when the needle bar 22 is raised, the upper end of the needle bar 22 is supported by being inserted into the upper support piece 21b of the guide 21.
Here, since the needle bar 22 is only inserted through the mounting cylinder 26, the needle bar 22 is rotatable around its axis.

Further, a needle holder 22 b is screwed to the lower end portion of the needle bar 22.
A plurality of needle insertion holes are concentrically provided at equal intervals on the lower surface of the needle holder 22b.
In addition, a needle insertion hole is also provided on the concentric circle.
Then, the upper portions of punch needles 22c formed with barbs (not shown) are inserted into these needle insertion holes and screwed.

The lower part of the needle bar 22 is inserted through a cylindrical fixing screw 27 fixed to the lower surface of the lower support piece 21a of the guide 21.
The upper portion of the fixing screw 27 is a large-diameter fixing portion 27a, and the lower portion thereof is a screw portion 27b having a small diameter and a thread formed on the outer periphery.
A cylindrical lock screw 28 having a screw thread formed on the inner periphery thereof is screwed to the screw portion 27b of the fixing screw 27, and the needle bar 22 is inserted through the lock screw 28.
Further, a cylindrical movable screw 29 having a thread on the inner periphery is screwed to the threaded portion 27b, and the needle bar 22 is inserted through the movable screw 29.
Therefore, the movable screw 29 can be moved up and down with respect to the fixing screw 27 and the guide 21 by screw feeding.
At the same time, the movable screw 29 can be locked at a predetermined elevation position by moving the lock screw 28 up and down and screw-feeding the movable screw 29 in a tightening direction.
Further, the movable screw 29 has a mounting groove 29a continuous on the entire outer periphery thereof.

On the other hand, a disc-shaped cloth presser plate 30 is disposed below the needle bar 22, and a punch needle 22 c is inserted into an insertion hole 31 that is a circular hole at the center of the cloth presser plate 30.
Further, the side cover 32 extends upward from three places at equal intervals on the periphery of the cloth presser plate 30, and the interval between the adjacent side covers 32 is such that the punch needle 22c can be exchanged from there. A needle replacement window 32b is configured.
Here, an inward flange 32 a is formed at the upper end of the side cover 32, and the flange 32 a is fitted in the mounting groove 29 a of the movable screw 29.
Therefore, the side cover 32 and the cloth presser plate 30 are supported by the movable screw 29 so as to be rotatable in the circumferential direction.
With this configuration, the presser foot 30 can be moved up and down in conjunction with the up and down movement of the movable screw 29.
Here, the cloth presser plate 30 and the side cover 32 are formed by integrally molding a transparent synthetic resin, and the state of the punch needles 22 c and the like can be visually recognized through the transparent side cover 32.

The needle plate 11 is fixed to the upper surface of the bed 10 just below the needle bar 22.
The needle plate 11 is provided with a needle hole 11a as a circular hole into which all punch needles 22c are inserted when the needle bar 22 is lowered.
The needle hole 11a coincides with the center of a concentric circle drawn by punch needles 22c arranged in parallel on the needle clamp 22b, and the diameter thereof is slightly larger than the diameter of the concentric circle of the punch needle 22c. .

Further, a cylindrical support 12 is fixed to the bottom surface of the bed 10 directly below the needle hole 11a.
The support 12 extends toward the center of the needle hole 11a so that its upper end is substantially flush with the needle plate.
Therefore, the punch needle 22c attached to the center of the concentric circle on the needle clamp 22b is inserted into the cylinder of the support 12 when the needle bar 22 is lowered.

The needle punch machine 1 of the embodiment has the above structure.
As shown in FIG. 4, in use, a fiber aggregate F1 such as a fabric is placed on the needle plate 11 and another fiber aggregate F2 such as a felt material is superimposed thereon (hereinafter referred to as “felt material”). (Abbreviated as fabric F1 and felt material F2, respectively).
In this state, the movable screw 29 is screw-fed to lower the cloth presser plate 30 and pressed from above with the cloth presser plate 30 so that the overlapped fabric F1 and felt material F2 do not move.

Next, the needle bar 22 is moved up and down by driving the motor, and the punch needle 22c is inserted and removed from the overlapped fabric F1 and felt material F2.
As shown in FIG. 5, when the needle bar 22 is lowered, the punch needle 22c penetrates the felt material F2 and the fabric F1 in this order from the top of the felt material F2, and the tip portion is inserted into the needle hole 11a and the support 12 of the needle plate 11. .
Next, when the needle bar 22 is raised, the punch needle 22c comes out of the needle hole 11a and the support 12 of the needle plate 11 and penetrates the fabric F1 and the felt material F2 in this order from the bottom of the fabric F1.
This operation is continuously repeated at a high speed.

Thus, by inserting and removing the punch needle 22c, the fibers of the felt material F2 applied to the barb of the punch needle 22c are entangled with the fibers of the fabric F1 by being pushed from the upper surface side of the fabric F1 to the back side, The felt material F2 is fixed to the fabric F1 by entanglement.
In this way, when a part of the felt material F2 is once fixed to the fabric F1, and then the fabric F1 is fed, the felt material F2 is successively fixed to the fabric F1 by the insertion and removal of the punch needle 22c.

Here, since the fixing plate 27, the lock screw 28, and the movable screw 29 constituting the presser foot plate 30 and its raising / lowering mechanism are integrally disposed at the lower portion of the needle bar 22, the work does not interfere with the operation. The person can smoothly work from any direction, and can smoothly feed the fabric F1 in any direction.
Further, since the presser plate 30 and the side cover 32 are formed of a transparent synthetic resin, the working state can be visually recognized through the side cover 32 and the like.
Furthermore, even when the punch needle 22c breaks, the broken piece hits the side cover 32, so that the broken piece does not scatter and the operator's safety is ensured.
Furthermore, since the cloth presser plate 30 is rotatable, when the cloth feed direction is switched, the cloth presser plate 30 rotates at any time along the switching direction, so that the cloth feed direction can be smoothly switched.

Further, when the needle bar 22 is lowered, all the punch needles 22c are inserted through one large needle hole 11a of the needle plate 11 as shown in FIG.
For this reason, even if the punch needle 22c is slightly swung, it does not collide with the needle plate 11, and the punch needle 22c is prevented from being broken.
Furthermore, since the support body 12 that supports the fabric F1 and the felt material F2 on the same plane as the needle plate 11 is disposed at the center of the needle hole 11a, the fabric F1 and the like when the punch needle 22c is inserted into and extracted from the fabric F1 and the like. Does not fall into the bed 10 from the needle hole 11a, and the accuracy of the work is good.

Furthermore, since the needle bar 22 rotates about its axis, the insertion / extraction location of the punch needle 22c with respect to the fabric F1 and the felt material F2 is irregularly shifted.
Therefore, needle punching is performed uniformly, and the efficiency of tangling the fabric F1 and the felt material F2 is improved.

When exchanging the punch needle 22c, first, the needle bar 22 is manually rotated to bring the punch needle 22c to be exchanged to a position facing the operator's working position.
Then, by rotating the side cover 32 with respect to the movable screw 29, the needle replacement window 32b between the side covers 32 is brought to a position facing the operator's working position.
In this manner, the punch needle 22c can be easily replaced through the needle replacement window 32b without the operator moving from the work position.

The lifting mechanism of the cloth presser plate 30 is not limited to the embodiment, and the lock screw 28 may be omitted. Further, as the elevating mechanism, for example, another mechanism such as a latch feed mechanism may be used.
Moreover, the structure which attaches the side cover 32 with respect to the movable screw 29 rotatably is not limited to embodiment, For example, a mounting groove is formed in the inner periphery of the side cover 32, and a flange is formed in the outer periphery of the movable screw 29 However, these may be inserted.
A cylindrical body is continuously provided on the upper surface of the cloth presser plate 30, and when the needle bar 22 is lowered, the punch needle 22c is accommodated in the cylindrical body, so that it is possible to prevent the fragments from being scattered due to breakage of the punch needle 22c. You may expect.

In this embodiment, the needle bar 22 is configured to freely rotate around its axis, but a rotation drive mechanism that forcibly rotates the needle bar 22 around its axis may be provided separately.
When the needle bar 22 is forcibly rotated, needle punches to the fabric F1 and the like are made more evenly, and the efficiency of entanglement is further improved.

  In addition, the configuration that allows the needle bar 22 to move up and down with respect to the mechanism that moves up and down is not limited to the embodiment. For example, a concave line that is continuous in the circumferential direction of the needle bar 22 is provided, and the inner circumference of the mounting cylinder is provided. It is good also by providing a protruding item | line in and inserting these.

The shape of the support 12 is not limited as long as it does not interfere with the punch needle 22c, and may be a cylindrical body, a rectangular cylinder, a prismatic body, or the like.
Further, the shape of the needle hole 11a is not limited as long as it does not interfere with the punch needle 22c, and may be changed to a square hole or the like appropriately corresponding to the arrangement of the punch needle 22c.

Side sectional view showing the main parts of the needle punch machine Front sectional view of needle punch machine Cross section of needle bar part of needle punch machine Side view of the main part showing the needle bar of the needle punching machine raised Side view of the main part showing the needle bar of the needle punch machine being lowered Top view of needle punch machine bed

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Needle punch machine 10 Bed 11 Needle plate 11a Needle hole 12 Support body 20 Arm 21 Guide 21a Lower support piece 21b Upper support piece 22 Needle bar 22a Thrust collar 22b Needle clamp 22c Punch needle 23 Drive shaft 24 Crank 24a Crank pin 25 Connecting rod 26 Mounting cylinder 26a Rear end portion 27 Fixing screw 27a Fixing portion 27b Screw portion 28 Locking screw 29 Moving screw 29a Mounting groove 30 Work clamp plate 31 Insertion hole 32 Side cover 32a Flange 32b Needle replacement window

Claims (3)

A needle bar,
An elevating drive mechanism that supports the needle bar so as to be rotatable about its axis and movable up and down;
A needle clamp attached to the lower end of the needle bar;
A punch needle fixed to the lower surface of this needle clamp and formed with a barb for hooking the fiber;
A needle punch, comprising: a needle plate disposed below the needle bar, the needle plate for placing two or more fiber aggregates superimposed so that fibers are intertwined by insertion and removal of the punch needle Machine. The needle bar has a pair of collar portions arranged in parallel in the axial direction on the peripheral surface thereof,
2. The needle punching machine according to claim 1, wherein the elevating drive mechanism has an attachment cylinder that is loosely fitted between the collar portions of the pair of needle bars and supports the needle bar so as to be movable up and down.   The needle punching machine according to claim 1 or 2, further comprising a rotation drive mechanism for forcibly rotating the needle bar about its axis.

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